Fix compilation with gcc-4.3

Index: hydrogen/src/tools/HydrogenPlayer.cpp
===================================================================
--- hydrogen.orig/src/tools/HydrogenPlayer.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/tools/HydrogenPlayer.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -25,6 +25,7 @@
 
 #include <qapplication.h>
 
+#include <cstdlib>
 #include <iostream>
 #include <stdio.h>
 #include <string>
Index: hydrogen/src/gui/DrumkitManager.cpp
===================================================================
--- hydrogen.orig/src/gui/DrumkitManager.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/gui/DrumkitManager.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -22,6 +22,7 @@
  *
  */
 #include <qcursor.h>
+#include <cstdlib>
 
 #include "config.h"
 #include "Skin.h"
Index: hydrogen/src/gui/HydrogenApp.cpp
===================================================================
--- hydrogen.orig/src/gui/HydrogenApp.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/gui/HydrogenApp.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -46,6 +46,7 @@
 #include "LadspaFXProperties.h"
 #include "SongEditor/SongEditorPanel.h"
 
+#include <cstdlib>
 #include <qdockwindow.h>
 #include <qsplitter.h>
 #include <qhbox.h>
Index: hydrogen/src/gui/main.cpp
===================================================================
--- hydrogen.orig/src/gui/main.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/gui/main.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -42,6 +42,7 @@
 #include "lib/DataPath.h"
 #include "lib/Exception.h"
 
+#include <cstdlib>
 #include <iostream>
 using namespace std;
 
Index: hydrogen/src/lib/FLACFile.cpp
===================================================================
--- hydrogen.orig/src/lib/FLACFile.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/lib/FLACFile.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -54,6 +54,8 @@
 		string m_sFilename;
 };
 
+#include <cstring>
+
 
 
 FLACFile_real::FLACFile_real() : Object( "FLACFile_real" )
Index: hydrogen/src/lib/drivers/OssDriver.cpp
===================================================================
--- hydrogen.orig/src/lib/drivers/OssDriver.cpp	2010-02-12 17:32:37.000000000 +0100
+++ hydrogen/src/lib/drivers/OssDriver.cpp	2010-02-12 17:32:59.000000000 +0100
@@ -31,6 +31,8 @@
 
 #include <pthread.h>
 
+#include <cstring>
+
 audioProcessCallback ossDriver_audioProcessCallback;
 bool ossDriver_running;
 pthread_t ossDriverThread;